How to Set Up an eSIM: Step-by-Step Guide
Clear instructions for activating an eSIM on iPhone and Android — plus the common mistakes that trip people up.
Last updated: April 2026
Make sure you have these three things:
Setting up an eSIM takes 2-5 minutes. The process is slightly different on iPhone and Android, so follow the section for your device. If you haven't bought an eSIM yet, check our cheapest eSIM guide or country guides first.
iPhone Setup (iOS 17+)
Step 1: Open eSIM Settings
Go to Settings → Cellular → Add eSIM.
On older iOS versions (below 17), this may appear as "Add Cellular Plan" instead.
Step 2: Scan QR Code
Tap "Use QR Code" and point your camera at the QR code from your eSIM provider. Hold the phone steady — the code scans in 1-2 seconds.
If you can't scan (e.g., QR code is on the same phone), tap "Enter Details Manually" and type in the SM-DP+ address and activation code from your provider.
Step 3: Confirm and Label
Your iPhone will show the plan details. Tap "Add eSIM" (or "Add Cellular Plan"). When prompted, give it a label — something like "Travel Data" or "Japan eSIM" so you remember which is which.
Step 4: Set as Data Line
iOS will ask which line to use for cellular data. Select your new eSIM as the data line. Keep your original SIM for voice calls and texts.
You can change this anytime in Settings → Cellular → Cellular Data.
Step 5: Disable Home SIM Data Roaming
Go to Settings → Cellular, tap your home SIM line, and turn off Data Roaming. This prevents surprise charges from your home carrier.
Pro tip: Install the eSIM profile at home before your trip, but don't enable the data line until you arrive. Most providers start counting your plan validity from first network connection, not from installation.
Android Setup (Samsung, Pixel, Others)
Android setup varies slightly by manufacturer, but the core flow is the same.
Step 1: Open SIM Settings
Samsung: Settings → Connections → SIM Manager → Add eSIM
Pixel: Settings → Network & Internet → SIMs → Add eSIM
Other Android: Settings → Network & Internet → Mobile Network → Add (or "Download a SIM instead")
Step 2: Scan QR Code
Select "Scan QR code" (or "Download a SIM" on some devices). Point your camera at the QR code. The profile downloads in about 30 seconds.
If scanning doesn't work, look for "Enter code manually" or "Help" and type the activation details provided by your eSIM provider.
Step 3: Activate the Plan
Once downloaded, tap the new eSIM profile and toggle it on. Some phones ask if you want to enable it immediately — tap "Yes."
Step 4: Set Data Preferences
Go to your SIM settings and set the eSIM as your preferred data SIM. Keep your physical SIM as the default for calls and SMS.
Step 5: Disable Home SIM Roaming
In your SIM settings, tap your home SIM and turn off data roaming. This ensures all data goes through the eSIM, not your home carrier's expensive roaming.
Common Mistakes (and How to Avoid Them)
1. Phone Is Carrier-Locked
If your phone was bought through a carrier on a plan, it may be locked to that network. eSIM profiles from other carriers won't install on a locked phone. Contact your carrier to request an unlock — most will do it for free if your plan is paid off.
2. Forgetting to Disable Home SIM Roaming
This is the most common (and expensive) mistake. If your home SIM's data roaming is on, your phone might route some data through your home carrier — even when the eSIM is active. Always turn off roaming on the home SIM.
3. Activating Too Early
Most eSIM plans start counting their validity period from the moment you first connect to a network in the covered country. If you activate a 7-day plan on Tuesday but don't arrive until Thursday, you've already burned two days. Install the profile early, but wait to enable the data line.
4. Weak WiFi During Installation
The eSIM profile download is small (a few KB), but it needs a stable connection. If your WiFi drops during the download, the installation can fail. Use a reliable connection — your home WiFi, not a shaky airport network.
5. Deleting the QR Code Too Soon
Keep your QR code email or screenshot until you've confirmed the eSIM is working. If the first scan fails, you may need it again. Some providers allow only a limited number of scans per QR code.
6. Not Checking APN Settings
Most eSIMs configure APN (Access Point Name) settings automatically. But occasionally, especially with lesser-known providers, you may need to enter APN settings manually. Check your provider's setup guide if data doesn't work after activation.
Troubleshooting
eSIM Installed but No Data Connection
- Check that the eSIM is set as your data line (not your home SIM)
- Toggle Airplane Mode on for 10 seconds, then off
- Restart your phone
- Check APN settings (your provider's website will have the correct values)
- Make sure you're in the eSIM's coverage area
QR Code Won't Scan
- Ensure your screen brightness is at 100% if scanning from another device
- Try zooming in on the QR code
- Use the manual entry option instead — your provider email should include the SM-DP+ address and activation code
"eSIM Could Not Be Added" Error
- Verify your phone is carrier-unlocked
- Check that your phone model supports eSIM
- Confirm you haven't reached the maximum stored eSIM profiles (delete old ones you no longer need)
- Try on a different WiFi network
- Contact your eSIM provider's support — they can reissue the QR code if needed
When to Set Up Your eSIM (Timing Guide)
| When | What to Do |
|---|---|
| 1-7 days before trip | Purchase your eSIM plan and receive QR code |
| 1-2 days before trip | Install the eSIM profile on WiFi at home (don't enable data yet) |
| At the airport (departure) | Turn off data roaming on your home SIM |
| Landing at destination | Enable the eSIM data line → connected in seconds |
| End of trip | Disable eSIM data line, re-enable home SIM roaming if needed |
FAQ
How do I activate an eSIM on iPhone?
Go to Settings → Cellular → Add eSIM (or Add Cellular Plan on older iOS versions). Choose "Use QR Code" and scan the QR code from your eSIM provider. Label the plan, set it as your data line, and you're connected.
How do I activate an eSIM on Android?
Go to Settings → Network & Internet → SIMs → Add eSIM (or "Download a SIM instead"). Scan the QR code from your eSIM provider. The profile downloads in about 30 seconds. Enable the new plan and set it as your data SIM.
Can I set up an eSIM without WiFi?
You need an internet connection to download the eSIM profile. WiFi is the most common method, but you can also use your existing mobile data connection. Many travelers install their eSIM at home on WiFi before the trip.
What if my eSIM QR code doesn't work?
First, ensure you have a stable WiFi connection. Check that your device is eSIM-compatible and carrier-unlocked. Try entering the activation code manually instead of scanning. If it still fails, contact your eSIM provider — most offer 24/7 chat support.
When should I activate my travel eSIM?
Install the eSIM profile before your trip (at home on WiFi), but don't enable the data line until you arrive at your destination. Most plans start counting validity from the moment you first connect to a network in the coverage area.
How do I switch between my home SIM and travel eSIM?
On iPhone, go to Settings → Cellular and choose which line to use for data. On Android, go to Settings → Network & Internet → SIMs and tap the line you want active. You can keep both lines active with one handling calls and the other handling data.
Do I need to remove my physical SIM to use an eSIM?
No. Most modern phones support dual SIM — your physical SIM and eSIM work simultaneously. Keep your physical SIM for calls and texts, and use the eSIM for data.
Find the Right eSIM for Your Trip
Now that you know how to set up an eSIM, find the best plan for your destination. We compare plans from Apple-approved providers across 200+ countries.